Sankharé grew up in the northern suburbs of Paris in Val-d'Oise and joined his hometown club in 2001 arriving at the Camp des Loges as a youth player. After spending nearly six years in the club's youth system and the reserves, Younousse signed his first professional contract, in June 2007, agreeing to a three-year deal.[1]

Due to the club's positive form in league play and also playing well in Europe, on 26 January 2009, Sankharé was sent on loan by manager Paul Le Guen to Ligue 2 club Stade Reims in order to increase the player's playing time.[11] He made his debut just four days later playing 90 minutes in a 0–0 draw with Guingamp.[12] He appeared in every following league match scoring no goals gaining experience in the process, despite Reims suffering relegation to the third-tier National. He returned to Paris on 1 July.

In March 2013, it was announced that Sankharé had rejected the chance to play for Mauritania and would like to play for Senegal at international level.[13] He declared his international future with Senegal in December 2014.[14]